Across
- 2. spits light
- 4. shorter
- 5. The Photoelectric Effect
- 6. work
- 7. milky way
- 9. The Watermill Center
- 12. the sun
- 15. light
- 17. space growth
- 18. stellar nucleosynthesis
Down
- 1. modern astronomy
- 3. afterglow
- 8. cosmic web
- 10. stretched
- 11. balloons
- 13. water former
- 14. cosmic microwave background radiation
- 16. celestial objects